* {
  padding: 0;
  margin: 0;
  list-style: none;
  text-decoration: none;
  color: black;
}

.header {
  height: 20vh;
  display: flex;
  padding: 0;
  /* border-bottom: .5px solid black; */
  box-shadow: 1px 1px 1px gray;
}

.header-a {
  width: 15vw;
  line-height: 60px;
}

.header-a a {
  color: #000000;
  margin-left: 50px;
  /* border: 1px solid red; */
  transition: all 0.5s;
}
.header-a a:hover{
  color: lightskyblue;
}
.header-b {
  width: 70vw;
}

.title {
  display: flex;
  margin: 0 auto;
  width: 8vw;
  margin-top: 15px;
}

.title>li {
  flex: 1;
  height: 35px;
  text-align: center;
  line-height: 35px;
  border-radius: 20px;
  transition: all 1s;
}

.title>li:hover {
  background-color: lightskyblue;
}

.title>li>a {
  color: #000000;
  transition: all 1s;
}
.title>li>a:hover{
  color: white;
}

.header-c {
  width: 15vw;
}

.title-c {
  display: flex;
  width: 14vw;
  margin-top: 15px;
  /* border: 1px solid red; */
}

.title-c>li:nth-child(1) {
  /* margin-left: 20px; */
  flex: 5;
}

.title-c>li>a {
  color: #000000;
  transition: all 0.5s;
}

.title-c>li>a:nth-child(1) {
  line-height: 30px;
}

.title-c>li>a:hover {
  color: lightskyblue;
}
